Dental spraying apparatus.



PATENTED sEPT. 2 2, 1903.

I J. c. HOLSON. DENTAL SPRAYING APPARATUS.

APPLICATION FILED OUT. 24' 1902.

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Patented September 22, 1903.

PATENT OFFICE.

JOHN C. HOLSON, OF 0RD, NEBRASKA.

DENTAL sPRAvmo'APPARATus.

SPECIFICATION forming part of Letters Patent No."7 39,674, dated September 22, 1903.

Application filed October 24, I902. Serial No. 128,58 (No model.) I

To all whom it may concern:

Be it known that'l, JOHN G. HOLSON, a citizen of the United States, and a resident of 0rd, in the county of Valley and State of Nebraska, have invented a new and Improved Dental Spraying Apparatus, of which the following is a full, clear, and exact description.

This invention relates to a valvular nozzle adapted to be connected to a hose or other source of water-supply.

The present improvements lie in a special construction of nozzle-body and in the peculiar arrangement therewith of a valve to be controlled at will by the person manipulating the nozzle.

This specification is a specific description of one form of the invention, while the claim defines the actual scope thereof.

Reference is to be had to the accompanying drawings, forming a part of this specification, in which similar characters of reference indicate corresponding parts in both the figures.

Figure l is a side elevation showing the invention applied to a dental engine, and Fig.

2 is an enlarged longitudinal section of the nozzle. I

By way of illustration I have shown the invention applied to a dental engine for spray ing water on the tool and toothduring operation.

0 indicates the flexible shaft, 6 the barrel or handpiece, and d the tool.

a b indicate the water-supply.

f indicates the body of the nozzle, to which the tube 11 leads, and 9 indicates any suitable means for securing the nozzle alongside of the handpiece 6.

The bodyfhas at its inner end a nipple to engage the hose b, this nipple having the passage f' formed therein, and said passage extending into the body of the nozzle and terminating in a valve-seat f. This valve-seat lies in the valve-chamber f and-from said.

chamber a passage f leads forward to the front end of the nozzle. At said end the body f is formed with a reduced threaded portion f, on which is fastened the mouthpiece h.

In the valve-chamberf? is located the valve '11, the stem of which passes laterally of the nozzle to the outside thereof. The valvechamber f extends to the outer wall of the nozzle, and in the outer portion of the chamber is fastened a cap 21*, closing the chamber andhaving the stem of the valve 11 passed snugly yet movably therethrough. On the outer end of the stem of the valve ii are formed two collars z", with which is loosely engaged the end of a finger-lever k. This lever is fulcru med intermediate its ends on the outside of the nozzle, and a spring it" presses outward its second end.

5 The valve '11 controls communication from the passage f to the passage 7, and hence by operating this valve the nozzle may be. opened or closed at will.

The spring 70 holds the valve seated, and owing to the arrangement'of parts, as shown, the nozzle may be manipulated and operated with great convenience.

Having thus described my invention, I claim as new and desire to secure by Letters Patent- A valvular nozzle, comprising a body having a valve-chamber therein, said chamber extending to the outer wall of the body and having a valve-seat in its inner portion, the

body'also having passages leading from its inner end to the valve-chamber and from the valve-chamber to the outer end of the body,

'a cap secured in the outer portion of the valve-chamber to close the same, a valve working on the seat in the chamber and having its stem passed loosely through the cap, a finger -lever fulcrumed on the outside of the nozzle-body and connected to the stem of the valve, and a spring pressing the lever normally to close the valve.

In testimony whereof I havesigned my name to this specification in the presence'of two subscribing witnesses.

v JOHN CPHOLSON. lVitnes'ses:

. ARTHUR L. PERKINS,

.J. V. JOHNSON, J r. 

